LimeSDR Mini Output Power Levels - Revision history

G8GKQ: /* Source Data */

2019-01-12T18:03:10Z

Source Data

G8GKQ at 17:59, 12 January 2019

2019-01-12T17:59:29Z

G8GKQ at 17:54, 12 January 2019

2019-01-12T17:54:52Z

G8GKQ at 17:41, 12 January 2019

2019-01-12T17:41:04Z

G8GKQ: Created page with "The output power of the Lime Mini varies significantly across the bandwidth and does not vary linearly with adjustments to the "Lime Gain" on the Portsdown. ===Variation with..."

2019-01-12T17:17:57Z

Created page with "The output power of the Lime Mini varies significantly across the bandwidth and does not vary linearly with adjustments to the "Lime Gain" on the Portsdown. ===Variation with..."

New page

The output power of the Lime Mini varies significantly across the bandwidth and does not vary linearly with adjustments to the "Lime Gain" on the Portsdown.

===Variation with Frequency===

The measurements below were made with a LimeSDR Mini using a Portsdown transmitter (version 201812290) at Lime Gain = 88.

[[File:LimeSDR Mini Output.jpg|963px]]

@@ Line 55: / Line 55: @@
 ! Lime Gain !! Carrier dBm !! 4x Up-sampling dBm !! 2x Up-sampling dBm
 |-
-| 100 || 13.5 || 12.5 || Example
+| 100 || 13.5 || 12.5 || 13.5
 |-
-| 99 || 12.0 || 11.6 || Example
+| 99 || 12.0 || 11.6 || 11.7
 |-
-| 98 || 12.0 || 11.6 || Example
+| 98 || 12.0 || 11.6 || 11.7
 |-
-| 97 || 12.0 || 10.1 || Example
+| 97 || 12.0 || 10.1 || 11.7
 |-
-| 96 || 10.0 || 10.1 || Example
+| 96 || 10.0 || 10.1 || 9.7
 |-
-| 95 || 10.0 || 9.0 || Example
+| 95 || 10.0 || 9.0 || 9.7
 |-
-| 94 || 10.0 || 9.0 || Example
+| 94 || 10.0 || 9.0 || 9.7
 |-
-| 93 || 6.4 || 6.8 || Example
+| 93 || 6.4 || 6.8 || 5.8
 |-
-| 92 || 6.4 || 6.8 || Example
+| 92 || 6.4 || 6.8 || 5.8
 |-
-| 91 || 6.4 || 6.8 || Example
+| 91 || 6.4 || 6.8 || 5.8
 |-
-| 90 || 6.4 || 4.8 || Example
+| 90 || 6.4 || 4.8 || 5.8
 |-
-| 89 || 5.4 || 4.8 || Example
+| 89 || 5.4 || 4.8 || 4.8
 |-
-| 88 || 4.4 || 4.8 || Example
+| 88 || 4.4 || 4.8 || 3.9
 |-
-| 87 || 4.4 || 0.5 || Example
+| 87 || 4.4 || 0.5 || 3.9
 |-
-| 86 || 4.4 || 0.5 || Example
+| 86 || 4.4 || 0.5 || 2.8
 |-
-| 85 || 2.4 || 0.5 || Example
+| 85 || 2.4 || 0.5 || 1.8
 |-
-| 84 || 1.4 || 0.5 || Example
+| 84 || 1.4 || 0.5 || 0.8
 |-
-| 83 || 1.4 || -0.5 || Example
+| 83 || 1.4 || -0.5 || 0.8
 |-
-| 82 || 0.3 || -0.5 || Example
+| 82 || 0.3 || -0.5 || -0.2
 |-
-| 81 || -0.6 || -1.5 || Example
+| 81 || -0.6 || -1.5 || -1.2
 |-
-| 80 || -1.8 || -2.3 || Example
+| 80 || -1.8 || -2.3 || -2.2
 |-
-| 79 || -2.6 || -3.3 || Example
+| 79 || -2.6 || -3.3 || -3.2
 |-
-| 78 || -2.6 || -4.3 || Example
+| 78 || -2.6 || -4.3 || -3.2
 |-
-| 77 || -3.6 || -4.3 || Example
+| 77 || -3.6 || -4.3 || -4.2
 |-
-| 76 || -3.6 || -5.3 || Example
+| 76 || -3.6 || -5.3 || -4.2
 |-
-| 75 || -5.6 || -6.4 || Example
+| 75 || -5.6 || -6.4 || -6.2
 |-
-| 74 || -5.6 || -7.4 || Example
+| 74 || -5.6 || -7.4 || -6.2
 |-
-| 73 || -5.6 || -7.4 || Example
+| 73 || -5.6 || -7.4 || -6.2
 |-
-| 72 || -7.6 || -8.4 || Example
+| 72 || -7.6 || -8.4 || -8.2
 |-
-| 71 || -7.6 || -9.4 || Example
+| 71 || -7.6 || -9.4 || -8.2
 |-
-| 70 || -7.6 || -9.4 || Example
+| 70 || -7.6 || -9.4 || -8.2
 |}

@@ Line 46: / Line 46: @@
 The use of intermediate Lime Gain values is not recommended as they give inconsistent results.  For example at Lime Gain 87, carrier mode generates 4 dB more power than DATV.
-For operation at other frequencies, the expected output power is reduced in line with the graph above.
+For operation at other frequencies, the expected output power should be reduced in line with the graph above.
 ===Source Data===
@@ Line 55: / Line 55: @@
 ! Lime Gain !! Carrier dBm !! 4x Up-sampling dBm !! 2x Up-sampling dBm
 |-
-| 100 || 13.5 || Example || Example
+| 100 || 13.5 || 12.5 || Example
 |-
-| 99 || 12.0 || Example || Example
+| 99 || 12.0 || 11.6 || Example
 |-
-| 98 || 12.0 || Example || Example
+| 98 || 12.0 || 11.6 || Example
 |-
-| 97 || 12.0 || Example || Example
+| 97 || 12.0 || 10.1 || Example
 |-
-| 96 || 10.0 || Example || Example
+| 96 || 10.0 || 10.1 || Example
 |-
-| 95 || 10.0 || Example || Example
+| 95 || 10.0 || 9.0 || Example
 |-
-| 94 || 10.0 || Example || Example
+| 94 || 10.0 || 9.0 || Example
 |-
-| 93 || 6.4 || Example || Example
+| 93 || 6.4 || 6.8 || Example
 |-
-| 92 || 6.4 || Example || Example
+| 92 || 6.4 || 6.8 || Example
 |-
-| 91 || 6.4 || Example || Example
+| 91 || 6.4 || 6.8 || Example
 |-
-| 90 || 6.4 || Example || Example
+| 90 || 6.4 || 4.8 || Example
 |-
-| 89 || 5.4 || Example || Example
+| 89 || 5.4 || 4.8 || Example
 |-
-| 88 || 4.4 || Example || Example
+| 88 || 4.4 || 4.8 || Example
 |-
-| 87 || 4.4 || Example || Example
+| 87 || 4.4 || 0.5 || Example
 |-
-| 86 || 4.4 || Example || Example
+| 86 || 4.4 || 0.5 || Example
 |-
-| 85 || 2.4 || Example || Example
+| 85 || 2.4 || 0.5 || Example
 |-
-| 84 || 1.4 || Example || Example
+| 84 || 1.4 || 0.5 || Example
 |-
-| 83 || 1.4 || Example || Example
+| 83 || 1.4 || -0.5 || Example
 |-
-| 82 || 0.3 || Example || Example
+| 82 || 0.3 || -0.5 || Example
 |-
-| 81 || -0.6 || Example || Example
+| 81 || -0.6 || -1.5 || Example
 |-
-| 80 || -1.8 || Example || Example
+| 80 || -1.8 || -2.3 || Example
 |-
-| 79 || -2.6 || Example || Example
+| 79 || -2.6 || -3.3 || Example
 |-
-| 78 || -2.6 || Example || Example
+| 78 || -2.6 || -4.3 || Example
 |-
-| 77 || -3.6 || Example || Example
+| 77 || -3.6 || -4.3 || Example
 |-
-| 76 || -3.6 || Example || Example
+| 76 || -3.6 || -5.3 || Example
 |-
-| 75 || -5.6 || Example || Example
+| 75 || -5.6 || -6.4 || Example
 |-
-| 74 || -5.6 || Example || Example
+| 74 || -5.6 || -7.4 || Example
 |-
-| 73 || -5.6 || Example || Example
+| 73 || -5.6 || -7.4 || Example
 |-
-| 72 || -7.6 || Example || Example
+| 72 || -7.6 || -8.4 || Example
 |-
-| 71 || -7.6 || Example || Example
+| 71 || -7.6 || -9.4 || Example
 |-
-| 70 || -7.6 || Example || Example
+| 70 || -7.6 || -9.4 || Example
 |}

← Older revision		Revision as of 17:54, 12 January 2019
Line 47:		Line 47:

	For operation at other frequencies, the expected output power is reduced in line with the graph above.		For operation at other frequencies, the expected output power is reduced in line with the graph above.
		+
		+	===Source Data===
		+
		+	To arrive at the values above, the output power was measured in each mode at 437 MHz:
		+	{\| class="wikitable"
		+	\|-
		+	! Lime Gain !! Carrier dBm !! 4x Up-sampling dBm !! 2x Up-sampling dBm
		+	\|-
		+	\| 100 \|\| 13.5 \|\| Example \|\| Example
		+	\|-
		+	\| 99 \|\| 12.0 \|\| Example \|\| Example
		+	\|-
		+	\| 98 \|\| 12.0 \|\| Example \|\| Example
		+	\|-
		+	\| 97 \|\| 12.0 \|\| Example \|\| Example
		+	\|-
		+	\| 96 \|\| 10.0 \|\| Example \|\| Example
		+	\|-
		+	\| 95 \|\| 10.0 \|\| Example \|\| Example
		+	\|-
		+	\| 94 \|\| 10.0 \|\| Example \|\| Example
		+	\|-
		+	\| 93 \|\| 6.4 \|\| Example \|\| Example
		+	\|-
		+	\| 92 \|\| 6.4 \|\| Example \|\| Example
		+	\|-
		+	\| 91 \|\| 6.4 \|\| Example \|\| Example
		+	\|-
		+	\| 90 \|\| 6.4 \|\| Example \|\| Example
		+	\|-
		+	\| 89 \|\| 5.4 \|\| Example \|\| Example
		+	\|-
		+	\| 88 \|\| 4.4 \|\| Example \|\| Example
		+	\|-
		+	\| 87 \|\| 4.4 \|\| Example \|\| Example
		+	\|-
		+	\| 86 \|\| 4.4 \|\| Example \|\| Example
		+	\|-
		+	\| 85 \|\| 2.4 \|\| Example \|\| Example
		+	\|-
		+	\| 84 \|\| 1.4 \|\| Example \|\| Example
		+	\|-
		+	\| 83 \|\| 1.4 \|\| Example \|\| Example
		+	\|-
		+	\| 82 \|\| 0.3 \|\| Example \|\| Example
		+	\|-
		+	\| 81 \|\| -0.6 \|\| Example \|\| Example
		+	\|-
		+	\| 80 \|\| -1.8 \|\| Example \|\| Example
		+	\|-
		+	\| 79 \|\| -2.6 \|\| Example \|\| Example
		+	\|-
		+	\| 78 \|\| -2.6 \|\| Example \|\| Example
		+	\|-
		+	\| 77 \|\| -3.6 \|\| Example \|\| Example
		+	\|-
		+	\| 76 \|\| -3.6 \|\| Example \|\| Example
		+	\|-
		+	\| 75 \|\| -5.6 \|\| Example \|\| Example
		+	\|-
		+	\| 74 \|\| -5.6 \|\| Example \|\| Example
		+	\|-
		+	\| 73 \|\| -5.6 \|\| Example \|\| Example
		+	\|-
		+	\| 72 \|\| -7.6 \|\| Example \|\| Example
		+	\|-
		+	\| 71 \|\| -7.6 \|\| Example \|\| Example
		+	\|-
		+	\| 70 \|\| -7.6 \|\| Example \|\| Example
		+	\|}

← Older revision		Revision as of 17:41, 12 January 2019
Line 6:		Line 6:

	[[File:LimeSDR Mini Output.jpg\|963px]]		[[File:LimeSDR Mini Output.jpg\|963px]]
		+
		+	The discontinuity at 2 GHz is where the output circuitry is switched between low band and high band.
		+
		+	===Variation with Lime Gain===
		+
		+	There are 3 modes that respond differently to the Lime Gain parameter: Carrier, DATV with 2x up-sampling and DATV with 4x up-sampling.
		+
		+	For Portsdown software version 201812290, the following Lime Gain settings are most consistent (plus or minus 1 dB) across the modes:
		+
		+	{\| class="wikitable"
		+	\|-
		+	! Lime Gain !! 437 MHz Power
		+	\|-
		+	\| 98 \|\| 11.8 dBm
		+	\|-
		+	\| 96 \|\| 10.0 dBm
		+	\|-
		+	\| 92 \|\| 6.3 dBm
		+	\|-
		+	\| 88 \|\| 4.4 dBm
		+	\|-
		+	\| 84 \|\| 0.8 dBm
		+	\|-
		+	\| 82 \|\| -0.1 dBm
		+	\|-
		+	\| 81 \|\| -1.1 dBm
		+	\|-
		+	\| 80 \|\| -2.1 dBm
		+	\|-
		+	\| 79 \|\| -3.0 dBm
		+	\|-
		+	\| 77 \|\| -4.0 dBm
		+	\|-
		+	\| 75 \|\| -6.0 dBm
		+	\|-
		+	\| 72 \|\| -8.0 dBm
		+	\|}
		+
		+	The use of intermediate Lime Gain values is not recommended as they give inconsistent results. For example at Lime Gain 87, carrier mode generates 4 dB more power than DATV.
		+
		+	For operation at other frequencies, the expected output power is reduced in line with the graph above.